2773 20160701171710.0 ASTROimport-930 De Cuyper, J. 2012 The Digitiser and Archive Facility at the ROB The Digitiser and astronomical plate Archive facility at the Royal Observatory of Belgium (ROB) is involved in the EU FP7 ESPaCE (European Satellite Partnership for Computing Ephemerides) project to digitise the photographic glass plates of the natural satellites of Mars, Jupiter and Saturn taken with the USNO 26 inch refractor by Dan Pascu over a period of 30 years. Also some plates of Pluto taken at USNO Flagstaff, at Lowell Observatory and at the Pulkovo Observatory are being digitised, in order to estimate the astrometric precision obtainable from the fitted positions in the digitised images and the improvement this has on the planetary ephemerides. The correction of the optical distortion caused by the actual objective/detector unit of the ROB digitiser is presented in detail. de Decker, G. Laux, U. Winter, L. Zacharias, N. Astronomical Data Analysis Software and Systems XXI 461 2012 315 http://esoads.eso.org/abs/2012ASPC..461..315D published in NONREF